Friday the 13th

Classification

Malware

Virus

-

Friday the 13th, South African

Summary

This is one of the oldest viruses around, but it is very rare. In fact, it may even be extinct, apart from copies in the hands of virus researchers. The original virus is 419 bytes long, but several minor variants are known, with slightly different lengths.

Like the Lehigh virus it can be stopped simply by making .COM files read-only. Most other viruses are not bothered by this, however.

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

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Submit a sample

Submit a file or URL for further analysis.

Technical Details


Variant:Virus-B

A variant where the destructive part has been disabled and which was distributed for demonstration purposes.


Variant:ENET 37

This 613 byte virus contains the text:


ENET N§37 Virus benigno - Por EDGE BAND! Realizado por un alumno del Enet 37 (?)
25/5/92 ..Hmmm.. Te parece usar la computadora un Domingo? Presiona una tecla.